/*
 * Copyright (C) 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.tools.idea.preview.interactive

import org.junit.Assert.assertEquals
import org.junit.Test

class FpsCalculatorTest {
  @Test
  fun testCorrectFps() {
    var currentTimeNanos = 0L
    val fpsCalculator = FpsCalculator { currentTimeNanos }

    fpsCalculator.resetAndStart()

    repeat(20) { fpsCalculator.incrementFrameCounter() }

    currentTimeNanos += 500_000_000

    assertEquals(fpsCalculator.getFps(), 40)
    assertEquals(fpsCalculator.getDurationMs(), 500)
  }
}
